I'm not sure. I have the same question. I have some expensive glasses that I use but I hate the way the frames fit. You could take them to a local optical specialist and ask that question. If you live close by you could come in our store and try some other frame styles. You can always send them back to Orvis or we'll do it and try something else. I'll talk to Daniel about it tomorrow and see if he knows the answer. He does the sunglasses buying here. Sorry I don't know the answer now. Byron